JP2711516B2 - Control valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump type refrigerant circuit in which a four-way switching valve for switching the flow path of refrigerant during cooling and heating and a motor-operated valve serving as an expansion valve are combined and integrated. In particular, the present invention relates to a control valve that operates a four-way switching valve by using a driving force of a motor-operated valve.

[0002]

2. Description of the Related Art FIG. 11 shows the structure of a conventional motor-operated valve A disclosed in Japanese Patent Application Laid-Open No. 3-260482, which is fixed to the outer peripheral portion of a cylindrical case 1 made of a non-magnetic material. When the stator coil 2 is energized, the rotor 5 of the motor integrally formed with the upper part of the screw shaft 4 having the needle valve 3 at the tip is rotated. The propulsion bearing 7 provided at the lower end converts the linear motion of the screw shaft 4 into and out of the needle port 3 at the lower portion of the valve body 6 so that the opening degree of the valve port 8 is controlled. In the upper inner peripheral surface of the rotor 5, a convex portion 9 is formed so as to protrude toward the center only at one place.

On the other hand, a lid 10 is hermetically fixed to the upper part of the case 1, and a flange 11
In addition to fixing the upper end of the support rod 12 provided with a stopper, a stopper 13 having a stopper piece 13a in a hanging shape is fixed at a position distant from the center, and the support rod 12 has an upper protruding piece 14 and a lower The coil-shaped delay transmission means 16 in which the projecting pieces 15 are projected substantially parallel to the tangential direction is loosely fitted (see FIG. 6).

Further, the projecting piece 14 above the delay transmitting means 16
Is configured to come into contact with the stopper piece 13a when the rotor 5 rotates about two times in the forward or reverse direction, and the lower protruding piece 15 is provided on one side of the convex portion 9 on the upper inner surface of the rotor 5. It comes into contact.

The valve body 6 has a chamber 17 in the center, and a pipe 1 is provided in an opening 18 on the side of the chamber.
9 also has a pipe 21 in the opening 20 below the lower valve port 8.
Is provided.

FIG. 12 shows a structure of a conventional four-way switching valve B disclosed in Japanese Patent Application Laid-Open No. 3-114681. The four-way switching valve B is disposed on a cylindrical valve body 31 and an upper portion thereof. The valve body 31 includes four openings 33, 34, 35, and 36 (see FIG. 2) attached to the lower end of a cylindrical case 32 made of a non-magnetic material at equal intervals on a concentric circle. A metal disc-shaped valve seat 37, a plastic magnet thick disc-shaped valve body 39 disposed on the upper surface of the valve seat 37 so as to be slidable and rotatable around a metal shaft 38. It consists of

The four openings 33, 34, 3 of the valve seat 37
5 and 36 each have a predetermined angle (90 °) as shown in FIG.
°) The openings 33 are introduced at intervals, and the openings 3 are positioned opposite to the inlets.
4 are outlets, and openings 35 and 3 arranged orthogonally to these outlets
6 are respectively formed as through holes, an inlet pipe 40 is provided on the lower surface of the inlet 33, an outlet pipe 41 is provided at the outlet 34, and through pipes 42 and 43 are provided at the through holes 35 and 36, respectively. A stopper 44 made of a pipe is provided only in the upper part of the inlet 33 in a projecting manner.

A cap 49 made of a non-magnetic material is fixed to the upper end of the case 32 by providing a space 50 between the upper end of the valve body 39 and supports the upper end of the shaft 38. I have.

As shown in FIGS. 2 and 3, the thick disk-shaped valve element 39 has an inlet 33 of the valve seat 37 and a through hole 3 formed therein.
In addition to providing through holes 45 and 46 at positions corresponding to 5,
A communication hole 47 connecting the through holes 45 and 46 is provided in the lower half thereof, while an airtight communication hole 48 airtightly connecting the outlet 34 and the through hole 36 at a position corresponding to the outlet 34 and the through hole 36. The lower portions of the communication holes 47 and 48 are formed in a plane arc shape, and the communication state is switched at each adjacent opening by rotating the valve body 39.

[0012] The electromagnet 51 disposed above the valve body 31 in FIG.
3 is wound, and the plastic magnet valve element 39 disposed under the coil 53 is rotated by the conversion of the N and S positions of the magnet by energizing the coil 53. The stopper 44 of the valve seat 37
And the communication hole 47 of the valve body 39. Also,
Positioning between the electromagnet 51 and the valve main body 31 is performed by fitting a positioning projection 54 provided below the coil 53 and a positioning recess 55 provided on the upper surface of the cap 49.

FIG. 13 shows a conventional separate electric valve A described above.
FIG. 3 is a circuit diagram showing a connection form of a refrigeration cycle using a four-way switching valve B and a refrigerant flow in a cooling operation, as shown by an arrow in a compressor F → introduction pipe 40 → four-way switching valve B →
Through-hole pipe 43 → outdoor heat exchanger D → pipe 21 → electric valve A →
It circulates from the pipe 19, the indoor heat exchanger E, the through-hole pipe 42, the four-way switching valve B, the outlet pipe 41, and the compressor F. An electric valve is provided between the electric valve A and the four-way switching valve B. A control board 59 provided by connecting the controller 56 for A and the controller 57 for the four-way switching valve B by lead wires 58, 58 was required.

[0012]

In the above-mentioned conventional system, the motor-operated valve A and the four-way switching valve B are separately manufactured, and these two are interlocked via the control board 59 provided with the respective controllers 56 and 57. Control, there were the following problems. Space for installing the motor-operated valve A and the four-way switching valve B was required. A stator coil 2 for a motor that operates the motor-operated valve A;
Each electric drive means, that is, an electromagnet 51 for operating the four-way switching valve B, is required individually, which has increased the cost. The control board 59 requires two controllers 56, 57 for the motor-operated valve A and the four-way switching valve B, and also requires lead wires 58, 58 for connecting these, thus increasing the cost.

[0013]

The control valve of the present invention comprises a motor-operated valve A functioning as an expansion valve and a four-way switching valve B for switching the refrigerant flow during cooling and heating. And rotating the valve body 39 of the four-way switching valve B via the transmission device C at the position immediately before closing the electric valve A and the position immediately before fully opening the electric valve A via the transmission device C. The control valve is characterized by switching between cooling and heating.

That is, the first control valve according to the present invention comprises:
When the rotor 5 in the case 1 is rotated by energization of the stator coil 2 on the outer periphery of the case 1 made of a non-magnetic material, a screw is formed via a screw shaft 4 integrally provided below the center of the rotor 5. A motor-operated valve A section that moves the needle valve 3 at the tip of the shaft up and down to control the opening of a valve port 8 below the valve body 6 provided at the lower end of the case 1, and a metal provided with at least three openings on concentric circles A disc-shaped valve seat 37 is provided at the upper end of the case 1, and the lower surface of the valve seat 37 is slid and rotated to air-tightly communicate at least two of the three openings. A four-way switching valve B section comprising a plastic valve body 39 to be opened and an electric valve A section provided between the rotor 5 of the electric valve A section and the valve body 39 of the four-way switching valve B section. Is constituted by a transmission device C that transmits rotation at a position immediately before the valve opening 8 is fully opened and at a position immediately before the fully closed position Using the rotational force of the rotor 5 of the motor-operated valve A, the opening and closing of the valve port 8 of the motor-operated valve A and the flow path switching by rotation of the valve body 39 of the four-way switching valve B are linked. A control valve characterized in that the control valve is operated.

In the second control valve according to the present invention, in the first control valve, the sliding rotation of the valve body 39 with respect to the valve seat 37 is provided on the lower surface of the valve seat 37 or the inner surface of the case 1. This is a control valve regulated by a valve body stopper 44 and a contact portion provided between the upper surface or the side surface of the valve body 39.

Further, the third control valve according to the present invention is the first and second control valves, wherein the valve seat 3 of the four-way switching valve B is provided.
7 between the valve body 39 and the valve body 39 due to the pressure of the refrigerant during operation.
This is a control valve provided with a compression coil spring 23 having a pressure weaker than the pressure pressing the valve 9 against the valve seat 37.

In a fourth control valve according to the present invention, in the first to third control valves, a disc-shaped valve seat 37 is provided.
Four openings are provided at equal intervals on the upper surface concentric circle, and a valve body 39 hermetically communicates two adjacent ones of the four openings, and communicates the other two openings with the case. The control valve is open to the large diameter portion 1a.

In the fifth control valve according to the present invention, in the first to fourth control valves, the transmission device C is connected to the guide bush 26 fixed in the stepped cylindrical case 1.
A connecting rod 28 is air-tightly and rotatably mounted. One end of the connecting rod 28 is provided with engaging means 30 for connecting to a valve body 39 of a four-way switching valve B portion. This is a control valve provided with a delay transmission means 16 for rotating the connecting rod 28 at a position immediately before the valve opening 8 is fully opened or immediately before the rotor 5 of the motor-operated valve A rotates several times.

A sixth control valve according to the present invention is the fifth control valve according to the fifth control valve, wherein the delay transmission means 16 is provided at a substantially central portion of a connecting rod 28 projecting below the guide bush 26 at a tip end. In a state where the stopper 13 provided with the hanging stopper piece 13a at the outer tip is fixed, and the upper and lower ends of the coil of a predetermined length are extended in arbitrary directions as the upper projecting piece 14 and the lower projecting piece 15 The connecting rod 28 is rotatably provided at the lower half thereof, and the tip of the protruding piece 14 above the connecting rod 28 can contact one side surface of the stopper piece 13a.
The control valve is such that the distal end of the lower protruding piece 15 can abut on an inward projection 9 formed on the inner surface of the upper half of the rotor 5.

[0020]

The control valve according to the present invention has a single cylindrical case.
A motorized valve A part and a four-way switching valve B part are equipped inside,
Since the transmission device C is integrally provided between the portions A and B, the portion B is operated by energizing the coil 2 of the portion A. The details of the operation are described in the following embodiment.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to FIGS. Note that the same reference numerals are used for the same parts as the conventional product, and the four-way switching valve B is described in a state where the four-way switching valve B is arranged upside down and assembled. As shown in FIG. 1, the control valve of the present invention includes a motor-operated valve A having a function as an expansion valve, a four-way switching valve B for switching the flow of refrigerant during cooling and heating, and a rotation of the motor-operated valve A. A transmission device C, which is provided between the valve 5 and the valve element 39 of the four-way switching valve B and transmits rotation at a position just before the valve port 8 of the motor-operated valve A is fully opened and at a position just before it is fully closed, The valve body 39 of the four-way switching valve B is operated by utilizing the driving force of the electric valve A, which is incorporated in the cylindrical case 1.

The basic structure of the motor-operated valve A is the same as the conventional one shown in FIG. 11, and in the present invention, as shown in FIG. At the lower end of the cylindrical case 1, a chamber 17 is provided at the center, a propulsion bearing 7 is provided at the upper center of the chamber, a valve port 8 is provided at a lower portion, and a valve body 6 having an opening 18 at the side of the chamber is arranged. 18 has an entrance / exit pipe 19
However, an inlet / outlet pipe 21 is provided in the opening 20 below the lower valve port 8.

A stator coil 2 is provided on the outer periphery of a lower portion of the case 1 and a rotor 5 of a motor integrally formed with an upper portion of a screw shaft 4 having a needle valve 3 at a tip thereof.
The screw shaft 4 is converted into a linear motion by the propulsion bearing 7, and the needle valve 3 is brought into contact with and separated from the valve port 8 at the lower portion of the valve body 6, thereby controlling the opening degree of the valve port 8. The inner peripheral surface of the upper half of the rotor 5
The rib-shaped convex portion 9 is formed in a protruding shape at one position in the center direction.

On the other hand, the basic structure of the four-way switching valve B is the same as the conventional one shown in FIG. 12 except for the electromagnet 51, and this four-way switching valve B is made of a non-magnetic material. At the upper end of the large diameter portion 1a at the top of the cylindrical case 1,
As shown in FIG. 2, a metal disk-shaped valve seat 37 having four openings 33, 34, 35, 36 concentrically and at equal intervals.
Is fixed, and on the lower surface of the valve seat 37 (shown above the valve seat 37 for convenience in FIG. 2), a thick disc-shaped plastic valve body 39 is slidably disposed. It is a thing.

The four openings 33, 34, 3 of the valve seat 37
As shown in FIG. 2, reference numerals 5 and 36 denote openings 33 at predetermined angle intervals (90 °) as inlets, openings 34 at positions facing the openings 33 as outlets, and openings 3 arranged at right angles thereto.
5 and 36 are provided as through holes, an inlet pipe 40 is provided on the upper surface of the inlet 33, an outlet pipe 41 is provided at the outlet 34, and through pipes 42 and 43 are provided at the through holes 35 and 36, respectively. A stopper 44 made of a pipe is provided only in a lower part of the inlet 33 so as to protrude in a small amount.

The thick disc-shaped valve body 39 has a structure shown in FIG.
As shown in FIG. 3, through holes 45 and 46 are provided at positions corresponding to the introduction port 33 and the through hole 35 of the valve seat 37, and a communication hole 47 (see FIG.
(See FIG. 3A), and an airtight communication hole 48 (see FIG. 3B) for airtightly connecting the outlet 34 and the through hole 36 is provided at a position corresponding to the outlet 34 and the through hole 36. The lower portions of the communication holes 47 and 48 are formed in a planar arc shape,
The point that the communication state is switched at each adjacent opening is the same as the function of the conventional four-way switching valve B.

However, as shown in FIG. 1, the thick disc-shaped valve body 39 of the present invention is provided with a hole 22 in the center of the upper surface thereof.
Is provided at the center of the lower surface of the valve body 39 on the opposite side, and a large number of internal teeth 25 are formed at the center of the boss 24. I have.

As shown in FIG. 1, a transmission device C for connecting the motor-operated valve A and the four-way switching valve B is provided between the rotor 5 of the motor-operated valve A and the valve body 39 of the four-way switching valve B. It is provided in the middle part of the cylindrical case 1 made of the non-magnetic material between them, and the valve port 8 of the motor-operated valve A transmits the rotation at a position just before full opening and a position just before fully closing.

That is, a guide bush 26 is caulked and fixed in the cylindrical case 1, and a connecting rod 28 having a flange 27 at an upper portion is air-tightly and rotatably supported at the center of the guide bush 26. External teeth 29 meshing with the internal teeth 25 at the center of the lower surface of the valve body 39 are formed at the upper end of the valve body 39, and the engagement means 30 is formed by the internal teeth 25 and the external teeth 29. However, the structure of the engagement means is not limited to the above-described embodiment, but may be other general clutches or other appropriate means.

The lower part of the connecting rod 28 penetrates the guide bush 26, and its lower end has the same structure as the supporting rod 12 of the conventional electric valve A shown in FIG. As an example, vertically projecting pieces 14, 15
The delay transmission means 16 is provided by a coil having the following. That is, the lower end of the connecting rod 28 extends to the inner surface of the upper half of the rotor 5 and has a flange 11 at the end.

The guide bush 26 of the connecting rod 28
A stopper 13 having a downwardly extending stopper piece 13a at its outer end is fixed slightly below the stopper 13.
As shown in FIGS. 1, 6, and 7, the upper and lower ends of the coil having a predetermined length are substantially parallel to the tangential direction between the lower end 3 and the lower end flange 11 as an upper projecting piece 14 and a lower projecting piece 15, respectively. The delay transmission means 16 is rotatably provided, and the tip of the protruding piece 14 above the delay transmission means 16 can be brought into contact with the stopper piece 13a. The rotor 5 can be brought into contact with an inward projection 9 formed on the inner surface of the upper half part.

If the projecting directions of the upper projecting piece 14 and the lower projecting piece 15 in the delay transmission means 16 are made substantially parallel as shown in the figure, the four-way switching valve B section is obtained after the rotor 5 has rotated about two times. , The projecting direction of the upper and lower projecting pieces 14 and 15 is not particularly limited, and may be any angle. Also, by not shown combining a plurality of delay transmission means by said coil in series, after any rotation, it is also possible so as to transmit the rotation by the rotor 5 to the valve body 39, further, the coil Alternatively, it is also possible to provide a protruding piece or a stopper piece on the upper and lower portions of the outer peripheral portion of the disk to transmit the rotation.

In the above embodiment, the delay transmission means 16 is shown as an example of the transmission device C. However, the transmission device is not limited to this embodiment, and various known transmission means can be applied.

FIGS. 9 and 10 show another embodiment of the present invention, in which three openings, that is, outlets 34 and through holes 35 and 36 are provided on the upper surface of a valve body 39, and an inlet 33 is provided. Is provided on the side of the large-diameter portion 1a of the case, and the introduction pipe 40 is horizontally extended from the introduction port 33, and a stopper 44 similar to the above is protruded into the case into the inside of the introduction port 33 by a small amount. It was made. In this case, the stopper mechanism of the valve body 39 includes two step-shaped stoppers formed by cutting the outer peripheral portion of the valve body 39 slightly (approximately 1/4) slightly larger than the amount of protrusion of the stopper 44. The rotation of the valve body 39 is restricted by contact portions 60 and 61 and a stopper 44 provided on the inner surface of the introduction pipe 40 so as to protrude a small amount into the case.

In this structure, at the time of switching between cooling and heating by rotation of the valve body 39, the step-like contact portions 60 and 61 abut against the side portion of the stopper 44 and the valve body 39 is positioned at a predetermined position. .

Next, the operation (operation) of the control valve according to the present invention.
Will be described. As shown in FIG. 1, the needle valve 3 of the motor-operated valve A is in the closed state, and as shown in FIGS. 3 and 4, the through holes 45 and 46 of the valve element 39 of the four-way switching valve B are in the valve seat 37. When the heating state is established corresponding to the introduction hole 33 and the through hole 35, as shown in FIGS. 6 and 7A, one side surface (upper surface) of the protrusion 9 of the rotor 5 in plan view. Contact the outer surface (lower surface) of the lower projecting piece 15 of the delay transmission means 16 and the outer surface (upper surface) of the upper projecting piece 14 against the outer surface (lower surface) of the stopper piece 13a. 15 is sandwiched between the protrusion 9 and the stopper piece 13a.

In this state, the valve seat 37 and the valve body 39
As shown in FIG. 4, the valve seat 3 of the four-way switching valve B portion
7. A stopper 44 protruding from the lower surface of the inlet 33
Is located at a position corresponding to the through hole 45 of the valve body 39. Therefore, as shown in FIG.
3 and the communication hole 35 are in communication with each other, and as shown by the chain line in FIG. 8, the refrigerant flowing out of the discharge port of the compressor F passes through the communication hole 47 from the introduction pipe 40 through the introduction port 33, Through-hole pipe 4
2, the indoor heat exchanger E, the inlet / outlet pipe 19 of the control valve A
As shown in FIG. 3B, the valve 8 passes through the outdoor heat exchanger D via the inlet / outlet pipe 21 and the inlet / outlet pipe 21, and through the through-hole pipe 43, the through-hole 36, the airtight communication hole 48, the outlet 34 and the outlet pipe 41. Return to the compressor F.

In this heating state, when the stator coil 2 of the motor-operated valve A is energized to rotate in the valve opening direction, the rotor 5 of the motor shown in FIGS. As shown in FIG. 7 (B), when the protrusion 9 of the rotor 5 separates from the lower projecting piece 15 of the delay transmission means 16 and rotates about one turn as shown in FIG. Hits inside (top).

Subsequently, when the rotor 5 rotates, the protruding piece 15 below the delay transmission means 16 is pushed by the convex portion 9 of the rotor 5 and rotates leftward together with the upper protruding piece 14, and eventually,
As shown in FIG. 7C, the rotor 5 rotates until the upper protruding piece 14 comes into contact with the rear surface (upper surface) of the sper piece 13a. During approximately two rotations of the rotor 5 between FIGS. 7A to 7C, the rotation is not transmitted to the connecting rod 28 due to idling of the coil in the delay transmission means 16. Accordingly, during this time, the opening area of the valve port 8 can be changed by the vertical movement of the needle valve 3 by the screw shaft 4, and the heating operation can be performed at the position of the optimal throttle degree.

Next, when it is desired to switch to the cooling operation, when the rotor 5 is further rotated to the left from the state of FIG. 7C, the rotor 5 is integrally fixed to the connecting rod 28 by the upper projecting piece 14. 7D while pressing the stopper piece 13a
, The connecting rod 28 starts rotating and transmits the rotation to the valve body 39 of the upper four-way switching valve B portion. Thereby, the valve body 39 is turned 90 ° from the state of FIG. 4 to the state of FIG.
It rotates and switches to cooling operation.

When switching from the heating operation to the cooling operation, the valve body 39 is rotated by 90 degrees.
The stopper 44, which has been in contact with the outer edge of the communication hole 47 on the side of the through-hole 45, comes into contact with the outer edge of the communication hole 47 on the side of the through-hole 46 as shown in FIG.

The switching of the valve body 39 causes the hermetic communication hole 48 to hermetically communicate between the outlet hole 34 and the through hole 35. Therefore, as shown by the solid line in FIG.
The refrigerant discharged from the discharge port of the control valve passes through the communication hole 47 from the introduction pipe 40 through the introduction port 33, passes through the through hole 36, enters the outdoor heat exchanger D through the through hole pipe 43, and enters and exits the control valve inlet / outlet pipe 21 → the valve port. 8 → through the entrance pipe 19, through the indoor heat exchanger E,
The flow returns to the compressor F via the through-hole pipe 42, the through-hole 35, the communication hole 48, the outlet 34, and the outlet pipe 41.

In this cooling operation, that is, when trying to obtain the optimum throttle in the state of FIG. 7D, the stator coil 2 is energized so that the needle valve 3 rotates in the valve closing direction. Accordingly, on the principle opposite to the above, the rotor 5 of the motor makes one rotation in the right direction opposite to the arrow when viewed from above without contacting the delay transmission means, and the protrusion 9 of the rotor is Delay transmission means 16
On the opposite side of the protruding piece 15 below. Then rotor 5
Is rotated, the protruding piece 15 below the delay transmission means 16 is pushed by the protrusion 9 of the rotor sleeve and rotates rightward,
The rotor 5 rotates until the upper protruding piece 14 comes into contact with the stopper piece 13a. During this time, the opening area of the valve port 8 can be changed by the up and down action of the needle valve 3 by the screw shaft 4, and the cooling operation can be performed at the position of the optimal throttle degree.

Next, when it is desired to switch to the heating operation again,
When the stator coil 2 is energized so that the needle valve 3 further rotates in the valve closing direction, the protruding piece 14 above the delay transmission means 16
7 comes into contact with the stopper piece 13a, the connecting rod 28 rotates clockwise in FIG. 7, and the valve body 39 rotates 90 ° from the state of FIG. 5 to the state of FIG.

[0045]

According to the control valve of the present invention, the motor-operated valve A and the four-way switching valve B are provided in one cylindrical case 1 as shown in the above-mentioned embodiment, and the control valve is provided between the two. Since the transmission device C is integrally provided in an interlocked state, the four-way switching valve can be operated in an interlocked manner by energizing the coil of the motor-operated valve section.

That is, the four-way switching valve is switched to the heating side (or cooling side) at the closing position of the electric valve A, and the four-way switching valve is switched to the cooling side (or heating side) at the open position. At an intermediate position, an integrated control valve that can have an expansion valve function of arbitrarily changing the opening degree of the valve port 8 becomes possible.

Therefore, the electromagnet in the four-way switching valve is not required, and the size is reduced. Since the controller and the lead wire in the four-way switching valve are not required, the cost is reduced. When a compression coil spring is provided between the valve body and the valve seat,
The valve body can rotate smoothly even with weak motor power. There is such an effect. Further, since both the control performance of the motor-operated valve and the switchability of the four-way switching valve are provided, control can be performed in exactly the same manner as the conventional product.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a heating state according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a valve seat and a valve body according to the present invention, and FIG.
Is a perspective view of a valve body, and (B) is a perspective view of a valve seat.

3A and 3B are cross-sectional views in a state where a valve seat and a valve body of the present invention are combined, wherein FIG. 3A is a cross-sectional view taken along line AA of FIG. 2 and FIG.

FIG. 4 is a plan view showing a positional relationship between a valve seat and a valve body during heating according to the present invention.

FIG. 5 is a plan view showing a positional relationship between a valve seat and a valve body during cooling according to the present invention.

FIG. 6 is a partially cutaway perspective view of the delay connection means of the present invention.

FIG. 7 is a plan view for explaining an operation state of the delay connection means of the present invention at the time of switching between cooling and warming, where (A) is for heating, (B) to (C) are for closing the valve port, (D) is a top view which shows the state at the time of cooling.

FIG. 8 is a refrigeration cycle diagram using a control valve according to the present invention.

FIG. 9 is a perspective view showing another embodiment of the present invention, in which an introduction pipe is provided on a side portion of a case.

FIG. 10 is a cross-sectional view of the valve body in the embodiment of FIG. 9;

FIG. 11 is a longitudinal sectional view of a conventional electric valve.

FIG. 12 is a longitudinal sectional view of a conventional four-way switching valve.

FIG. 13 is a refrigeration cycle diagram in a conventional cooling operation.

[Explanation of symbols]

A Motorized valve B Four-way switching valve C
Transmission device 1 Case 2 Stator coil 3
Needle valve 4 Screw shaft 5 Rotor 6
Valve body 7 Propulsion bearing 8 Valve port 9
Convex part 10 Lid 11 Flange part 1
2 Support rod 13a Stopper piece 13 Stopper 1
4 Upper projecting piece 15 Lower projecting piece 16 Delay transmission means 1
7 chamber 18 opening 19 pipe 2
0 opening 21 pipe 22 hole 2
3 Compression coil spring 24 Boss 25 Internal teeth 2
6 Guide bush 27 Flange 28 Connecting rod 2
9 External teeth 30 Engagement means 31 Valve body 3
2 Cylindrical case 33 Opening (inlet) 34 Opening (outlet) 3
5 Opening (through hole) 36 Opening (through hole) 37 Valve seat 3
8 compression coil spring 39 valve element 40 introduction pipe 4
DESCRIPTION OF SYMBOLS 1 Lead-out pipe 42 Through-hole pipe 43 Through-hole pipe 4
4 Valve body stopper 45 Through hole 46 Through hole 4
7 Communication hole 48 Communication hole 49 Cap 5
0 space 51 electromagnet 52 iron core 5
3 Coil 54 Positioning convex 55 Positioning concave 5
6 Controller 57 Controller 58 Lead wire 5
9 Control board 60, 61 Contact part

Continuation of the front page (56) References JP-A 2-132181 (JP, U) JP-A 62-43274 (JP, U) JP-A 62-174180 (JP, U) JP-A 3-114681 (JP) , U)

Claims (6)

(57) [Claims] 1. A screw shaft integrally provided below the center of the rotor 5 by rotation of the rotor 5 in the case 1 by energizing the stator coil 2 on the outer periphery of the case 1 made of a non-magnetic material. The needle valve 3 at the tip of the screw shaft is moved up and down via 4
The motor-operated valve A portion provided at the lower end of the case 1 for controlling the opening of the valve port 8 at the lower portion of the valve body 6 and a metal disk-shaped valve seat 37 provided with at least three concentric circles are provided. A four-way plastic valve body 39 is provided at the upper end, and the lower surface of the valve seat 37 is slid and rotated so that at least two of the three openings are air-tightly connected, and the other opening is open. The position of the valve port 8 of the motor-operated valve A, which is provided between the switching valve B and the rotor 5 of the motor-operated valve A and the valve element 39 of the four-way switching valve B, is just before and after the valve is fully closed. And a transmission device C for transmitting rotation at a position. The opening and closing of the valve port 8 of the motor-operated valve A and the valve body 39 of the four-way switching valve B are performed by utilizing the rotational force of the rotor 5 of the motor-operated valve A. A control valve characterized in that the switching of the flow path by the rotation of the valve is performed in conjunction. 2. The control valve according to claim 1, wherein the sliding rotation of the valve body with respect to the valve seat is regulated by a valve body stopper provided on the lower surface of the valve seat. 3. A compression coil spring 23 having a pressure lower than a pressure for pressing the valve body 39 against the valve seat 37 by the pressure of the refrigerant during operation is provided between the valve seat 37 of the four-way switching valve B and the valve body 39. The control valve according to claim 1, wherein the control valve is provided. 4. A disc-shaped valve seat 37 having four openings provided at equal intervals on a concentric circle on the upper surface thereof.
4. The method according to claim 1, wherein two adjacent ones of the four openings are air-tightly communicated with each other, and the other two openings are communicated with each other and open to the large-diameter portion 1a of the case. A control valve as described in 5. A connecting rod 28 is hermetically and rotatably mounted on a guide bush 26 fixed to a stepped cylindrical case 1 in a transmission device C. One end of the connecting rod 28 is Engaging means 30 for connecting to valve element 39 of four-way switching valve B
A delay transmission means 1 is provided at the other end of the connecting rod 28 so that the connecting rod 28 is rotated at a position immediately before the valve port 8 is fully opened or immediately before the valve port 8 is fully closed after the rotor 5 of the motor-operated valve A rotates several times.
The control valve according to any one of claims 1, 2, 3, and 4, further comprising: 6. The delay transmission means 16 includes a guide bush 2
6, a stopper 13 having a hanging stopper piece 13a at an outer end thereof is fixed to a substantially central portion of a connecting rod 28 projecting downward. And a lower protruding piece 15 rotatably provided on a lower half portion of the connecting rod 28 in a state of being extended in an arbitrary direction, and a tip of the upper protruding piece 14 can contact one side surface of the stopper piece 13a. The control valve according to claim 5, wherein the tip of the lower protruding piece (15) is capable of abutting on an inward protrusion (9) formed on the inner surface of the upper half of the rotor (5).